Video: OK, like, riding a bike on a handrail on top of a dam is very clearly not the smartest thing a person could do. But hot dang the views are actually sort of amazing.
On one side, there's the footpath. And on the other side is a sweeping view of a 200m tall dam, the Koelnbreinsperre in Austria. The drop is terrifyingly steep, and bike rider Fabio Wibmer seems very close to losing his balance more than a few times, so be careful as you watch the video because you might pass out from holding your breath too long.